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Page 1 of 6, FUNDAMENTAL OF PHYSICS, for IIT-JEE, NEET, 11th & 12th, 1.1 Some of the most profound statements on the nature of science have come from Albert, Einstein, one of the greatest scientists of all time. What do you think did Einstein mean when he, said: "The most incomprehensible thing about the world is that it is comprehensible"?, Solution:, The complex physical world involves different orders of magnitudes in space, time and mass. Despite, this, nearly all physical phenomena can be expressed in terms of a few basic laws. By this view,, Einstein's statement "The most incomprehensible thing about the world is that it is, comprehensible" becomes very clear., Give some examples, 1.2 "Every great physical theory starts as a heresy and ends as a dogma, from the history of the science of the validity of this incisive remark., Solution:, One of the general observations in our daily life is that light travels, propounded his wave theory, it was a heresy. However, soon it became dogma as interference, patterns, refraction etc. could be successfully explained on the basis of wave theory., It was believed that light was only energy but when the photoelectric effect was discovered it was, proposed that light had a particle nature too, this was greatly debated and treated as heresy. However,, Einstein finally proved it with his quantum theory of light. Henceforth, it has been treated as a dogma., straight line. When Huygens, 1.3 "Politics is the art of the possible". Similarly, "Science is the art of the soluble". Explain this, beautiful aphorism on the nature and pra, ice of science, Solution:, Politicians make anything and everyth, observation. Scientist and researchers study these observations and then work out certain laws from, them. There is a multitude of natural phenomena taking place in this universe and all of them can be, explained in terms of some basic laws. For e.g. F = mg is true for you and me and also for a star. Thus,, in science we see that various phenomena are related, they are soluble and can be explained with, similar or the same law. This goes on to justify that science is the art of the soluble just as politics is the, art of the possible., possible to win votes. Science is a systematized study of, 1.4 Though India now has a large base in science and technology, which is fast expanding, it is, still a long way from realising its potential of becoming a world leader in science. Name some, important factors, which in your view have hindered the advancement of science in India., Here are some important factors that have obstructed the growth of science in India:, Lack of infrastructure and funds for quality research work in science., Poor pay scales and other facilities to scientists as compared to administrators., Science education is neither properly oriented nor directed. It needs specific directions, depending on our requirements. The industrialists are the actual consumers of new technology, and research. The industrialists of this country have little confidence in the ability of Indian, scientists. There is practically no co-ordination between the researchers and the industrialists., for IIT-JEE, NEET, 11th & 12th, R.K.Sharma (8507152734)
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Page 2 of 6, FUNDAMENTAL OF PHYSICS, for IIT-JEE, NEET, 11th & 12th, Rural-based science education is nearly non-existent so that majority of the population is, deprived of the benefits of advancements in technology and science., 1.5 No physicist has ever "seen" an electron. Yet, all physicists believe in the existence of, electrons. An intelligent but superstitious man advances this analogy to argue that ghosts', exist even though no one has 'seen' one. How will you refute his argument?, Solution:, Even though an electron has never been 'seen' but its effects have been observed and its practical, evidence have been tested and proved. E.g. electricity. However, regarding spirits and ghosts, even, though there are many claims and sightings, standardized scientific reading and evidence have never, been observed or successfully tested. Thus, we really cannot state with a cent per cent surety that they, exist., 1.6 The shells of crabs found around a particular coastal location in Japan seem mostly to, resemble the legendary face of a Samurai. Given below are two explanations of this observed, fact. Which of these strikes you as a scientific explanation?, (a) A tragic sea accident several centuries ago drowned a young Samurai. As a tribute to his, bravery, nature through its inscrutable ways immortalised his face by imprinting it on the crab, shells in that area., (b) After the sea tragedy, fishermen in that area, in a gesture of honour to their dead hero, let, free any crab shell caught by them which accidentally had a shape resembling the face of a, Samurai. Consequently, the particular shape of the crab shell survived longer and therefore in, course of time the shape was genetically propagated. This is an example of evolution by, artificial selection., [Note: This interesting illustration is taken from Carl Sagan's 'The Cosmos' highlights the fact, that often strange and inexplicable facts which on the first sight appear 'supernatural' actually, turn out to have simple scientific explanations. Try to think out other examples of this kind]., Solution:, (a) More logical and, 1.7 The industrial revolution in England and Western Europe more than two centuries ago was, triggered by some key scientific and technological advances. What were these advances?, NDANSN, The rise of modern Science and industrial revolution are closely connected to each other. The other, profound impact effect that Science had on the development of modern science is that the application, of Science to solve the industrial problems garnered public support and interest in Science., Some of the key discoveries and their uses are listed below:, The application of thermodynamics and heat to form the steam engine are some of the key, advances in Science and technology during the period of the industrial revolution., for IIT-JEE, NEET, 11th & 12th, R.K.Sharma (8507152734), PHSIC
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Page 3 of 6, FUNDAMENTAL OF PHYSICS, for IIT-JEE, NEET, 11th & 12th, Implementation and discovery of electricity helped in the invention of motors and dynamos., Likewise, the study of gravitation led to the study of motion which further led to the development, of cannons and guns. This invention gave power in the hands of western countries and they, ruled over the rest of the world., The discovery of explosives not only helped the army but also helped in mineral exploration., These were a few examples of scientific breakthroughs that helped England and Europe to have their, prominent positions in the world., 1.8 It is often said that the world is witnessing now a second industrial revolution, which will, transform the society as radically as did the first. List some key contemporary areas of Science, and technology, which are responsible for this revolution., Solution:, Some key contemporary areas of technology and Science, which are chiefly responsible for a new, industrial revolution taking place now and likely to take place in the near future are:, Artificial intelligence, Design of super-fast computers., Biotechnology, Development of superconducting materials at room temperature., Advancements in the field of, - Electronics, - Information technology, → Nanotechnology, - Developments in the field of Space Sciences, MENTALOF RHYSICS, 1.9 Write in about 1000 words a fiction piece based on your speculation on the Science and, technology of the, enty-second century., Solution:, In the 22nd century, humans will be able to create wormholes allowing people to travel to distant places in the, be in contact with aliens and have established human settlements outside the earth as, well. With advancements in quantum Physics we shall be more aware and understanding of the true nature, of our universe and existence. Our technologies will not pollute and degrade earth. Artificial intelligence and, humans could have some clashes., 1.10 Attempt to formulate your 'moral' views on the practice of Science. Imagine yourself, stumbling upon a discovery, which has great academic interest but is certain to have nothing, but dangerous consequences for human society. How, if at all, will you resolve your dilemma?, Solution:, A scientist works for the truth. Every scientific discovery reveals a certain truth of nature. So, any, discovery, bad or good for mankind, must be made public., But with that being said, we cannot afford to be blind to consequences. Before disclosing it we must, for IIT-JEE, NEET, 11th & 12th, R.K.Sharma (8507152734)
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Page 4 of 6, FUNDAMENTAL OF PHYSICS, for IIT-JEE, NEET, 11th & 12th, ascertain the degree of good or bad consequences it will have. If we know that a certain discovery has, nothing but dangerous consequences to offer to the mass, the discovery is best kept limited only to the, knowledge of the scientist and researches working on it. This way the discovery can help societies in, the long run without completely destroying it now., 1.11 Science, like any knowledge, can be put to good or bad use, depending on the user. Given, below are some of the applications of science. Formulate your views on whether the particular, application is good, bad or something that cannot be so clearly categorised:, (a) Mass vaccination against smallpox to curb and finally eradicate this disease from the, population. (This has already been successfully done in India)., (b) Television for the eradication of illiteracy and for mass communication of news and ideas., (c) Prenatal sex determination, (d) Computers for the increase in work efficiency, (e) Putting artificial satellites into orbits around the Earth, (f ) Development of nuclear weapons, (g) Development of new and powerful techniques of chemical and biological warfare)., (h) Purification of water for drinking, (i) Plastic surgery, (j) Cloning, Solution:, (a) Good. Mass vaccination helped eradicate the dreaded diseases from the Earth., (b) Good. Television helps in the literacy, and entertainment., aign and is an effective method of mass communication, (c) Bad. Prenatal sex determination, the case of the female foetus., onsidered bad because it gives rise to the practice of abortion in, (d) Good. Computer increases work efficiency., (e) Good. Artificial satellites help in the worldwide communication process., (f) Bad. Nuclear weapc, misused may cause mass destruction of mankind., (g) Bad. These, niques may be misused for destructive purposes., (h) Good. Puri, water improves the health of people., (i) Neither good nor bad. Plastic surgery is something which can't be classified as either good or bad, because it helps to remove a certain type of deformations in needy persons., ) Bad. Cloning has the potential to ruin the normal family life of human society., 1.12 India has had a long and unbroken tradition of great scholarship - in mathematics,, astronomy, linguistics, logic and ethics. Yet, in parallel with this, several superstitious and, obscurantist attitudes and practices flourished in our society and unfortunately continue even, today – among many educated people too. How will you use your knowledge of science to, develop strategies to counter these attitudes?, for IIT-JEE, NEET, 11th & 12th, R.K.Sharma (8507152734)
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Page 5 of 6, FUNDAMENTAL OF PHYSICS, for IIT-JEE, NEET, 11th & 12th, Solution:, In order to popularize scientific explanations of everyday phenomena, mass media like, → Internet, → Newspapers, - Television, - Radio, should be used. Knowledge of Science should be educated to the masses so that they learn about the, real causes of phenomenon allowing their superstitious beliefs to wash away., 1.13 Though the law gives women equal status in India, many people hold unscientific views on, a woman's innate nature, capacity and intelligence, and in practice give them a secondary, status and role. Demolish this view using scientific arguments, and by quoting examples of, great women in science and other spheres; and persuade yourself and others that, given equal, opportunity, women are on par with men., Solution:, No difference is noticed in the ability of women and men as far as work, intelligence, decision making is, concerned. Nature makes little difference in the anatomy and feeling of men and women. The nutrition, content of prenatal and postnatal diet contributes a lot towards the development of a human body. If, equal opportunities are provided to both women and men, then the female mind and body will be just as, efficient as a man's. The list of great women who have excelled in their respective fields is enormous., Names of, - Madame Curie, Indira Gandhi, - Florence Nightingale, Margaret Thatcher, - Mother Teresa,, Sarojini Naid, been taken from fields varying from Sociology to Science and they all very well-known for their, contribution to the world. Reflecting the contribution being made to each and every sphere of life in the, country, it can be positively debated that women are no less essential to society than men., 1.14 "It is more important to have beauty in the equations of Physics than to have them agree, with experiments". The great British physicist P. A. M. Dirac held this view. Criticize this, statement. Look out for some equations and results in this book which strike you as beautiful., for IIT-JEE, NEET, 11th & 12th, R.K.Sharma (8507152734), NDAMENT OFAYSICS
